Bears' Bostic fined for hit

Chicago Bears rookie linebacker Jon Bostic received a $21,000 fine on Wednesday for lowering his head while hitting San Diego Chargers wide receiver Mike Willie in a preseason game last Thursday, according to multiple reports.

Bostic hit Willie in the chest area on a short pass in the Bears' 33-28 win. The force of the blow caused Willie to drop the ball. No penalty was called.

Keller, a tight end for the Miami Dolphins, is out for the season after suffering a knee injury on a low hit that the NFL considers legal by Houston Texans safety D.J. Swearinger in a preseason game last weekend.

Bostic took over as the Bears' No. 1 middle linebacker after D.J. Williams sustained a calf injury early in training camp. He has a $405,000 base salary this season.